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  #31  
Old 06-21-2009, 09:36 AM
R Bedell R Bedell is offline
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CM:



The crankshaft is in good order......there is no gouges or scratches not allowing the seal to do it's job...???
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  #32  
Old 06-21-2009, 10:33 AM
CMJAnew CMJAnew is offline
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The current leak is definitely coming from where the shaft and the seal meet. You can actually see it blowing out - plus I positioned a piece of cardboard out front to 'catch' the spray.

I thought the shaft felt smooth to the touch - but maybe I should focus on the key way specifically (that I did not do)

As one who is both mechanically disinclined and a cheapskate all this input is very helpful. I believe all the needed manuals are here and together now. So some of what you folks tell me may start to make more and more sense.

ThanksAgain. And please don't lose patience.
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  #33  
Old 06-21-2009, 11:12 AM
murphycc
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Yes your breather tube comes out of one of the valve covers. Clear or replace the tube and clean breather or replace breather filter.

I suspect something else is awry though. Seals are directional, is it in backwards? Burrs on the crank?

Scott
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  #34  
Old 06-21-2009, 11:18 AM
CMJAnew CMJAnew is offline
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Originally Posted by murphycc View Post
Yes your breather tube comes out of one of the valve covers. Clear or replace the tube and clean breather or replace breather filter.

I suspect something else is awry though. Seals are directional, is it in backwards? Burrs on the crank?

Scott
The seal was put in spring side first, and flush with the housing (tapped in gently using the rounded handle end of a screwdriver)
__________________________________________
NEW INFORMATION
I can move the shaft in and out, maybe 1/8 of an inch. There is no movement up and down or side to side. (this is a horizontal engine).
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  #35  
Old 06-21-2009, 06:10 PM
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Matt G. Matt G. is offline
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NEW INFORMATION
I can move the shaft in and out, maybe 1/8 of an inch. There is no movement up and down or side to side. (this is a horizontal engine).
Some endplay is normal, but that seems excessive.
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  #36  
Old 06-22-2009, 10:35 PM
CMJAnew CMJAnew is offline
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Talked to a couple of small engine guys today. They seem to think I have a valve issue - stuck likely.

Sure hope my Craftsman deck shows up soon. That'll take the pressure off the Cub repair.
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  #37  
Old 06-22-2009, 10:51 PM
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A stuck valve will make your engine run like crap, but I don't know why it'd pressurize the crankcase and blow oil past the seals. I'd still check out the crankcase breather.
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  #38  
Old 06-23-2009, 05:55 AM
CMJAnew CMJAnew is offline
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A stuck valve will make your engine run like crap, but I don't know why it'd pressurize the crankcase and blow oil past the seals. I'd still check out the crankcase breather.
I removed the crankcase breather cover, but I don't know what I'm looking for as far as proper functioning goes.
What is the next step?
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  #39  
Old 06-23-2009, 08:36 AM
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In order to tell if it's working correctly, you should really measure the crankcase vacuum (with the breather reinstalled). To do this, you can make a U-tube manometer (I've attached the service manual page that explains it) and connect it up. If you don't have a vacuum, then the breather is most likely your problem. If you do, then it's something else.

I'm trying to remember what the Kohler twin breather looks like inside, but I think you're looking for a dirty or broken reed valve, for starters. Deteriorated gaskets don't help either.
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  #40  
Old 06-23-2009, 08:46 AM
CMJAnew CMJAnew is offline
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Thanks Much.
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